The "Lamson tube" was named after its inventor, William Stickney Lamson, a shop owner. He decided that there had to be a more cost effective method of handling a customer's money during a sale.
The Lamson company was the best known manufacturer of Cash Ball, Rapid Wire and Pneumatic Tube delivery systems.
Letter seal Lamson - Mix & Genest - Schöneberg Berlin
Pneumatic Tube, Rohrpost, Buizenpost